The Avengers #202

The tagline says it all — "Ultron Undying!" — and Dave Cockrum and Bob McLeod's cover delivers on that menace with the massive, skull-faced robot dominating the foreground as the Wasp fires her stings point-blank at him in a desperate close-quarters struggle. Behind her, Captain America, Thor, and the Vision charge into the chaos, promising that Earth's Mightiest Heroes are throwing everything they have at their near-indestructible foe. With Jim Shooter, David Michelinie, and George Pérez driving the story inside, this December 1980 issue looks like a genuinely thrilling showdown against one of the Avengers' most relentless adversaries.